Specialized sensors for high-precision measurement of strain (deformation) in structures and mechanical components at manufacturing sites. Available in metal foil, semiconductor, and optical fiber types, used for stress analysis, fatigue testing, and structural health monitoring. Applied to press machine die monitoring, bridge and building structure safety management, automotive and aircraft component strength evaluation, and manufacturing equipment load monitoring. Provides various specifications according to manufacturing environments, including temperature compensation and waterproof specifications. Measurement instruments specialized for direct measurement of minute deformations, with different measurement principles from load cells and pressure sensors.